Apparatus for filtering water.



No. 66|,|89. Patented Nov. 6, |900.

F. J. DLSEN & E. H. WHITMDRE.

APPARATUS FDR FILTEBING WATER.

(Application led Mar. 15, 1900.)

l(No Model.)

TH: Nonms 'persas co., vnoramno., ms'muamu. u4 cA UNi'rsD STATES PATENTCrrics.

FRANCIS JAMES -OLSEN AND EDWARD HENRY XVHITMORE, OF CHRIST- CHURCH, NEWZEALAND.

APPARA-TUS FOR FILTERIN'G WATER.

SPECIFICATION forming part of Letters Patent No. 661,189, dated November6, 1900.

Application nea March 15,1900. .semi No. 8.858. No model.)

, siding at 183 Hereford street, Christchurch,

in the Colony of New Zealand, have invented new and useful ImprovedApparatus for Filtering Vater, of which the following is aspecification.

This invention provides improved apparatus more particularly adapted forthe rapid iiltration of water under high pressure and containingchemicalimpurities and solid matter in suspension. It may, however, bealso used to treat Water under low pressure.

The apparatus consists of two cylindrical vessels, one of which isplaced within the other and contains receptacles lillefl with charcoaland lime. The inner cylinderis also provided with a plurality ofsuperposed shelves forming a number of compartments, one communicatingwith the other by an opening formed in each shelf. The space between theshelves is lled with broken granite or quartz, andthe openings in theshelves are arranged so that the water under treatment has to pass overas large an area of the broken granite as possible.

A feature of the invention consists in the employment of disks or cupsof felt for removing silt and solid matter from the water.

We will now more particularly describe our invention by the aid of theaccompanying drawings, wherein- Figure 1 is a vertical central sectionalelevation; Fig. 2, a plan; Fig. 3, a sectional plan on 3 3, Fig. 1; andFig. 4, a sectional plan on 4 4, Fig. 1.

Similar letters of reference indicate the same parts throughout thefigures. l

The outer cylinder a receives the cylinder b, which has a `flange c,resting upon the top of cylinder a. A cup el, made of felt or similarmaterial, is placed Within the upper part of cylinder b and receives adrum @,which is preferably made of porcelain,containin g charcoal. Asecond felt cup f within cup d receives a drum g, similar to drum e,containing lime. Each of the drums e and g has an opening h upon itsupper side to permit ofthe removal of its contents, and the top andbottom of each has communication with the chamber immediately above andbelow it through an opening l, with which each division-plate isprovided. The compartments s are filled with broken granite, quartz, orgravel, and the openings Z are formed upon opposite sides of thecylinder in alternate division-plates. The lower cover of cylinder b isperforated or formed of woven wire m, which rests upon the inturnedlower edge of the cylinder b, and the bottom of the cylinder fits withina felt cup n, supported upon an angle-ring o, secured within cylinder c.Beneath the felt n is a chamber-p for filtered water, which may bewithdrawn through a draw-off tap q.

The base r of cylinder o, is shown inclined in the illustrations toallow the whole of the water to be drawnfrom chamber p; but a horizontalbase may be used, lif desired.

The felt cups d f and disk t have each a flange resting upon the flangec of cylinder b and clamped between it and the cover u, which is securedin position by bolts fo, hinged upon cylinder a, each taking into a sloto', formed in an ear oprojecting from the cover, and having a Wing-nuto3, which screws down upon the ear.

Cover a is made dome-shaped and has a tap u', to which is connected apipe or hose bringing in the water to be filtered.

A blow through pipe w, the end of which is covered by a'screW-cap w', isemployed to permit silt and the like to be Washed from the upper surfaceof the felt disk t when necessary.

When the Water being treated is not improved by the employment of limein ltration, the lime in drum g may be substitutedby charcoal or thedrum left out of the apparatus.

In operation water is admitted through tap u and passes through the feltt, the lime in drum g, the felt f, the charcoal in drum e, and the feltd to the chambers s, containing the broken granite. The openings Z beingar- IOO ranged diametrically opposite to each other in alternatedivision-plates, the Water flows in the direction indicated by thearrows, Fig. l, and passes over a comparatively large area of brokengranite before reaching the felt disk n, through which it passes to thechamber p.

There are many ways in which cover u may be secured in position inaddition to that above described.

In our apparatus the parts which require cleansing can be readilywithdrawn, and especially the upper felt disk tcan be easily removedwhenever necessary and replaced by another disk kept for the purposewhich has been purified.

What we claim as our invention, and desire to secure by Letters Patent,is

l. In water-ltering apparatus the combination of two cylinders onewithin the other, the inner cylinder having superposed compartmentscontaining broken granite, a felt cup within the upper part of saidinner cylinder receiving a perforated drum containing charcoal, a secondfelt cup within the first arranged above the drum containing charcoaland receiving a perforated drum containing lime, a felt disk above thelime-drum, a cover through which water to be filtered is supplied meansfor securing said cover to the outer cylinder whereby the felt cups andfelt disk are clamped in position a felt disk at the bottom of saidinner cylinder, a chamber beneath it receiving filtered water and a tapupon the outer cylinder for withdrawing water from the chambersubstantially as specified herein and illustrated.

2. The combination in water-filtering apparatus of two cylinders onewithin the other the inner cylinder having superposed coinpartmentscontaining broken granite, a felt cup within the upper part of saidinner cylinder receiving a perforated drum containing charcoal, a feltdisk above said drum a cover having au opening to admit water to befiltered means for securing said cover to the outer cylinder andclamping the feltcup and disk in position a felt disk at the bottom ofsaid inner cylinder a chamber beneath said inner cylinder receivingfiltered water and a tap uponn the outer cylinder for withdrawing watertherefrom substantially as specified.

3. The combination in filtering apparatus of a cylinder containingbroken quartz a-felt cup within the upper part of said cylinder aperforated drum within said felt cup containing charcoal a cover oversaid cup through which water to be treated is admitted a reservoirforfiltered water at the perforated bottom of said cylinder and a tapfor withdrawing water from said reservoir substantially as specified andillustrated.

4. The combination in water-filtering apparatus of two cylinders onewithin the other,

the inner cylinder containing broken granite a felt cup within the upperpart of said inner cylinder receiving a perforated drum containingcharcoal, a felt disk above said drum a cover having an opening to admitwater to be filtered means for securing said cover to the outer cylinderand clamping the felt cups and disk in position a felt disk at thebottom of said inner cylinder a chamber beneath said inner cylinderreceiving filtered water and a tap upon the outer cylinder forwithdrawing water therefrom substantially as specified.

In testimony whereof we have signed this specification in the presenceof two subscribing witnesses.

FRANCIS JAMES OLSEN. EDWARD HENRY WHITMORE.

Witnesses:

HENRIE H. RAYWARD, ERNEST J. ANs'rIss.

